What are the requirements for getting "Fortune Strike"?

muramasa-the-demon-blade

Solution 1:

I believe that Fortune Strike occurs when you interrupt an enemy attack, causing them to flinch out of performing it.

I could be wrong.

Related

Where can I find a good written tutorial for Stargate Resistance?
Starcraft 2 friends online
Oddly predictable stutter, only in Crysis
The significance of "y"
Adverb placement: "There is still" vs. "there still is"
"An SATA device"? Weird article choice in suggested edit
Can I say "many of the United States"?
Eyeglasses, spectacles, goggles and glasses. But in which order?
What is an English word which means 'bêtement'?
Dialect "rules" and the pronunciation of individual words
Touch vs Tap (button)
What's the opposite of "bootstrap" (in business)?